Boring-machine



(No Model.)

H. WIGRANE.

BORING MACHINE.

No. 513,088. Patented Jan. 23, 1894.

WITNESSES: I v M/VE/VTUR ATTORNEYS ms mvneum. LITHOGRAFMINQ COMPANY" wAsmNmou. u c,

UNITED STATES PATENT OFFICE. I

HENRY W. CRANE, OE MILWAUKEE, WISCONSIN.

BORING-MACHINE.

SPECIFICATION forming part of Iietters Patent No. 513,088, dated January 23, 1894.

Application filed July 27. 1893. Serial No. 481,586. (No model.)

To all whom it may concern:-

Be it known that I, HENRY W. CRANE, of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented a new and.

In the drawings, Figure 1, is a front elevation of the complete device. Fig. 2, isa transverse vertical section about centrally of Fig. 1. Fig. 3, is a horizontal section on line 33 of Fig. 1, looking downwardly.

The frame for supporting the angers A A A and the other operative parts of the mechanism, consists of the elongated recessed parts B and B and the back plate B. The parts are secured detachably to each other by the transverse bolts M.

The shanks of the angers A, of which there are five in the device shown in the drawings, have their bearings in the frame, the angers being arranged parallel to and alongside of each other in the same plane. The central anger is provided with an elongated shank terminating in a truncated pyramidal stock or tang Nwhich is preferably secured detachably to the shank of the auger by turning on the screw threaded contracted terminal portion thereof. This tang N is adapted to receive thereon and engage a brace of the ordinary form in common use, for rotating the anger and the other'angers of the series.

Fordriving theaugers A and A from the central driven auger A, two trains of gears are employed, so as preferably to rotate all the angers in the same direction.

For rotating the angers A adjacent on either side to the central anger A, a cog wheel D rigid on the shank of the auger A meshes with the two wheels D loose on the posts E fixed in the frame, which wheels D in turn mesh with the wheels D" fixed respectively on the shanks of the angers A. By this train of wheels the angers A are driven from the auger A.

For driving the angers A a toothed wheel 0 fixed on the shank of the auger A meshes with wheels 0 loose on the shanks of the augers A, which wheels 0 in turn mesh with the wheels 0 fixed on tho shanks of the augers A". These wheels are all arranged in the recess of the frame, and the angers and the loose wheels are retained in place against endwise movement, by the bearing of the wheels against the sides of the frame and by means of sleeves F F interposed between the wheels and the frame and between the loose wheels and wheels. fixed on the shanks.

A handle G secured rigidly to the plate B" projects therefrom laterally at the rear of the device, and is adapted to be taken hold of by the operator for steadyin g the apparatus when in use, and for carrying it from place to place.

A straight guide bar H is provided with a series of apertures through which the twisted blades of the angers pass loosely. This bar is preferably constructed of some soft metal or composition, so that if the lips or cutting edges of the angers come in contact therewith they will not be appreciably dulled thereby. This bar is provided with guide rods L extending therefrom alongside of the angers and preferably in a plane therewith, which rods pass loosely through the frame, in such manner that the bar 11 moves readily toward and from the frame. The rods Lare conveniently secured to the bar H by tnrningtherethrough by screw thread and preferably project equallya little distance beyond thelower surface of the bar H. adapted for keeping the angers true, and not permitting them to spring or bend or in any other way to diverge from each other, when in use. A guide plate I at the rear of the guide bar H is secured thereto adjnstably by screws K. When used the guide plate I is set at such distance from the bar H, and consequently from the angers, as adapts it to be used as a gage for placing the angers on the edge of the door to be mortised, at the desired distance from its surface. For this purpose the bar H islet down before boring is commenced so that the lower extremities of the rods L This bar is especially will rest on the edge of the door, the plate I being placed against its surface, and as the boring proceeds the bar and plate will be carried toward the frame while still serving as a guide for the angers, and for holding the device in position relative to the door.

What Iclaim as my invention, and desire to secure by Letters Patent, is-

In a boring machine, the combination, of a frame, a plurality of angers mounted revolubly in the frame, means for driving one of the angers, gear wheels mounted fixedly on the driven auger, posts having gear wheels loose thereon, said gear wheels meshing with one of the fixed gears of the driven auger, gear wheels on the shanks of other of the angers, one of the gear wheels of each of said angers tion from one of the fixed gears of the driven shaft, substantially as set forth.

In testimony whereof I aifix my signature in presence of two witnesses.

HENRY XV. CRANE.

WVitnesses:

C. T. BENEDICT, ANNA V. FAUST. 

